On optimal ambiguity resistant precoders in ISI/multipath cancellation

Xiang Gen Xia; Guangcai Zhou

doi:10.1109/82.861407

On optimal ambiguity resistant precoders in ISI/multipath cancellation

Xiang Gen Xia, Guangcai Zhou

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Ambiguity resistant (AR) preceding has recently been proposed in intersymbol interference (ISI) and multipath cancellations, where the ISI/multipath channel may have frequency-selective fading characteristics and its knowledge is not necessarily known. With the AR preceding, no diversity is necessary at the receiver. In the precoding, the AR property for a precoder plays an important rule. In this paper, more families and properties of AR precoders are presented and characterized. In particular, all systematic AR precoders are characterized. More importantly, we introduce the concepts of precoder distance and optimal precoders, and characterize and construct all optimal systematic AR precoders, when additive channel random noise is concerned. A necessary and sufficient condition for an AR precoder to he optimal is given, which is easy to check. With the optimal precoders, numerical simulations are presented to show the improved performance over the known AR precoders in ISI cancellation applications.

Original language	English
Pages (from-to)	746-756
Number of pages	11
Journal	IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Volume	47
Issue number	8
DOIs	https://doi.org/10.1109/82.861407
Publication status	Published - Aug 2000
Externally published	Yes

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title = "On optimal ambiguity resistant precoders in ISI/multipath cancellation",

abstract = "Ambiguity resistant (AR) preceding has recently been proposed in intersymbol interference (ISI) and multipath cancellations, where the ISI/multipath channel may have frequency-selective fading characteristics and its knowledge is not necessarily known. With the AR preceding, no diversity is necessary at the receiver. In the precoding, the AR property for a precoder plays an important rule. In this paper, more families and properties of AR precoders are presented and characterized. In particular, all systematic AR precoders are characterized. More importantly, we introduce the concepts of precoder distance and optimal precoders, and characterize and construct all optimal systematic AR precoders, when additive channel random noise is concerned. A necessary and sufficient condition for an AR precoder to he optimal is given, which is easy to check. With the optimal precoders, numerical simulations are presented to show the improved performance over the known AR precoders in ISI cancellation applications.",

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On optimal ambiguity resistant precoders in ISI/multipath cancellation

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